package com.itheima.service;

import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.apache.dubbo.config.annotation.Reference;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Component
public class SpringSecurityUserService implements UserDetailsService {
    //远程注入
    @Reference
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //数据库查找username
        User user = userService.findByUsername(username);
        //进行判断
        if(user==null){
            //查询用户信息为空
            return null;
        }

        List<GrantedAuthority>list=new ArrayList<>();
        //查到信息  遍历角色
        Set<Role> roles = user.getRoles();
        for (Role role : roles) {
            //为用户授予角色
         list.add(new SimpleGrantedAuthority(role.getKeyword()));
         //遍历权限
            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions) {
                //为用户授予权限
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }

        org.springframework.security.core.userdetails.User securityUser = new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);
        return securityUser;
    }
}
